煤质技术2024，Vol.39Issue(1)：1-10,10.DOI:10.3969/j.issn.1007-7677.2024.01.001
中低温煤焦油沥青组分的热解特性及动力学研究
Pyrolytic characteristic and kinetic study of medium-low-temperature coal tar pitch and its components
摘要
Abstract
Medium-low-temperature coal tar pitch was recognized as an important raw material for producing artificial carbon materials.Understanding the pyrolytic characteristics of the medium-low-temperature coal tar pitch is of great significance for the preparation of high-quality medium-low-temperature coal tar pitch based carbon materials.Four kinds of pitch components were obtained with the medium-low-temperature coal tar pitch as raw materials,and n-buta-nol(BA)and dimethyl sulfoxide(DMSO)as extracts,respectively.The pyrolysis behavior of medium-low-tempera-ture coal tar pitch and 4 kinds of group components was investigated by the thermogravimetric analyzer.The pyrolysis activation energies and pyrolysis kinetic parameters were calculated using the Flynn-Wall-Ozawa,Kissinger-Akahira-Sunose and Satava-Sestak methods.The results showed that the pyrolysis reaction mechanisms of the MLP,DMSOS and BAI conformed to the random nucleation and its subsequent growth model,and the optimal pyrolysis mechanism func-tions were G(α)=[-ln(1-α)]4/3,G(α)=[-ln(1-α)]4 and G(α)=[-ln(1-α)]2.Activation energies were 73.99、180.20 and 46.09 kJ/mol,and lg A were 5.82,13.57 and 3.32,respectively.The pyrolysis reaction mechanism of the BAS conformed to the two-dimensional diffusion model,and the optimal pyrolysis mechanism function was G(α)=α+(1-α)ln(1-α),E=85.36 kJ/mol,lg A=6.18.The pyrolysis reaction mechanism of the DMSOI conformed to the two-dimensional diffusion or three-dimensional diffusion model,and the optimal pyrolysis mechanism function was G(α)=[1-(1-α)1/3]2,E=64.42 kJ/mol,lg A=4.00.关键词
中低温煤焦油沥青/沥青组分/热解特性/热解动力学/扩散模型/热解机理函数/活化能/动力学参数Key words
medium-low-temperature coal tar pitch/asphalt components/pyrolysis characteristics/pyrolysis kinet-ics/diffusion model/pyrolysis mechanism function/activation energy/pyrolysis kinetic parameter分类
矿山工程引用本文复制引用
仝曜暄,张玉柱,赵振宁,何继良,朱亚明,程俊霞,赵雪飞..中低温煤焦油沥青组分的热解特性及动力学研究[J].煤质技术,2024,39(1):1-10,10.基金项目
国家自然科学基金资助项目(22208138) （22208138）
辽宁省自然科学基金资助项目(2021-MS-306,2021-BS-245) （2021-MS-306,2021-BS-245）
辽宁科技大学大学生创新创业基金资助项目(2024-187) （2024-187）
